72377749 has 2 divisors, whose sum is σ = 72377750. Its totient is φ = 72377748.

The previous prime is 72377713. The next prime is 72377759. The reversal of 72377749 is 94777327.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 70980625 + 1397124 = 8425^2 + 1182^2 .

It is a cyclic number.

It is not a de Polignac number, because 72377749 - 2¹⁹ = 71853461 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 72377699 and 72377708.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (72377759) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 36188874 + 36188875.

It is an arithmetic number, because the mean of its divisors is an integer number (36188875).

Almost surely, 2^72377749 is an apocalyptic number.

It is an amenable number.

72377749 is a deficient number, since it is larger than the sum of its proper divisors (1).

72377749 is an equidigital number, since it uses as much as digits as its factorization.

72377749 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 518616, while the sum is 46.

The square root of 72377749 is about 8507.5113282322. The cubic root of 72377749 is about 416.7430418573.

The spelling of 72377749 in words is "seventy-two million, three hundred seventy-seven thousand, seven hundred forty-nine".